August 2018
Beginner to intermediate
382 pages
7h 14m
Chinese
Content preview from Perl语言入门
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326
｜
附录
A
最后，使用星号的
glob
操作会返回（新）工作目录中所有的文件名，并自动按
字母排序，然后逐一输出。
2.
下面是实现方法之一：
print "Which directory? (Default is your home directory) ";
chomp(my $dir = <STDIN>);
if ($dir =~ /\A\s*\z/) { #
若是空行
chdir or die "Can't chdir to your home directory: $!";
} else {
chdir $dir or die "Can't chdir to '$dir': $!";
}
my @files = <.* *>; ##
现在加上了
.*
foreach (sort @files) { ##
现在排序
print "$_\n";
}
和前一题有两点差别：第一，这次的
glob
操作包含了“点号星号”，它会匹配
所有以点号开头的文件名；第二，我们必须对所得到的列表进行排序，因为取出
的列表中，以点号开头的文件名会和不以点号开头的文件名交错排列，看起来比
较凌乱，排序之后会清楚很多。
3.
下面是实现方法之一：
print 'Which directory? (Default is your home directory) ';
chomp(my $dir = <STDIN>);
if ($dir =~ /\A\s*\z/) { #
若是空行
chdir or die ...
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